FGFS-4.1/OpenSceneGraph
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Implemented clipping of widget to the widgets extents.

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This commit is contained in:
Robert Osfield
2014-05-23 18:59:16 +00:00
parent cca18e82e8
commit f50ec0fe8e
7 changed files with 78 additions and 49 deletions
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39
src/osgUI/Style.cpp
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@@ -14,7 +14,10 @@
#include <osgUI/Style>
#include <osg/Geode>
#include <osg/Depth>
#include <osg/TexGen>
#include <osg/AlphaFunc>
#include <osgText/Text>
#include <osgDB/ReadFile>
using namespace osgUI;
@@ -28,10 +31,25 @@ OSG_INIT_SINGLETON_PROXY(StyleSingletonProxy, Style::instance())
Style::Style()
{
osg::ref_ptr<osg::Image> image = new osg::Image;
image->allocateImage(1,1,1,GL_RGBA, GL_FLOAT);
*(reinterpret_cast<osg::Vec4f*>(image->data(0,0,0))) = osg::Vec4f(1.0f, 1.0f, 1.0f, 1.0f);
_clipTexture = new osg::Texture2D;
_clipTexture->setImage(image.get());
_clipTexture->setBorderColor(osg::Vec4f(1.0f,1.0f,0.5f,0.0f));
_clipTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
_clipTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
_clipTexture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
_clipTexture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
//image = osgDB::readImageFile("Images/lz.rgb");
//_clipTexture->setImage(image.get());
}
Style::Style(const Style& style, const osg::CopyOp& copyop):
osg::Object(style, copyop)
osg::Object(style, copyop),
_clipTexture(style._clipTexture)
{
}
@@ -93,6 +111,23 @@ osg::Node* Style::createIcon(const osg::BoundingBox& extents, const std::string&
void Style::setupDialogStateSet(osg::StateSet* stateset)
{
stateset->setRenderBinDetails(5, "TraversalOrderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS);
stateset->setAttributeAndModes( new osg::Depth(osg::Depth::LESS,0.0, 1.0,false), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
stateset->setMode( GL_LIGHTING, osg::StateAttribute::OFF );
stateset->setAttributeAndModes( new osg::Depth(osg::Depth::LESS,0.0, 1.0,false), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
}
void Style::setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset)
{
unsigned int clipTextureUnit = 1;
stateset->setAttributeAndModes( new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
stateset->setTextureAttributeAndModes( clipTextureUnit, _clipTexture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
osg::Matrixd matrix = osg::Matrixd::translate(osg::Vec3(-extents.xMin(), -extents.yMin(), -extents.zMin()))*
osg::Matrixd::scale(osg::Vec3(1.0f/(extents.xMax()-extents.xMin()), 1.0f/(extents.yMax()-extents.yMin()), 1.0f));
osg::ref_ptr<osg::TexGen> texgen = new osg::TexGen;
texgen->setPlanesFromMatrix(matrix);
texgen->setMode(osg::TexGen::OBJECT_LINEAR);
stateset->setTextureAttributeAndModes( clipTextureUnit, texgen.get(), osg::StateAttribute::ON);
}